Untitled

Follow the link from href as a callback
$('a').click(function(e) {
        savePage(previewPage);
    });

$('a').click(function(e) {
      var link = this;
      savePage(previewPage, function() {
          document.location = link.href;
      });
      return false;
});

function savePage(previewPage, callback) {
   ...
   ...

   if(typeof callback !== "undefined") {
      callback.call(null);
   }
}